The effect on removal efficiency and hydraulic performance of retrofitting an existing pond was modelled using the commercial software Mike21 and compartmental modelling. The Mike21 model had previously been calibrated on the studied pond. Installation of baffles, the addition of culverts under a causeway and removal of an existing island were all studied as possible improvement measures in the pond. The subsequent effect on hydraulic performance and removal of suspended solids was then evaluated. Copper, cadmium, BOD, nitrogen and phosphorous removal were also investigated for the improvement measure showing the best results. Outcomes of this study reveal that all measures increase the removal efficiency of suspended solids. The hydraulic efficiency is improved for all cases, except for the case where the island is removed. Compartmental modelling was also used to evaluate hydraulic performance and facilitated a better understanding of the way each of the different measures affected the flow pattern and performance. It was concluded that the installation of baffles is the best of the studied measures resulting in a reduction in the annual load on the receiving lake by approximately 8,000 kg of suspended solids, 2 kg of copper and 600 kg of BOD.

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BibTeX @conference{German2004,author={German, Jonas and Jansons, Ketah and Svensson, Gilbert and Karlsson, Dick and Gustafsson, Lars-Göran},title={Modelling of different measures for improving removal in a stormwater pond},booktitle={Proceedings of the 6th international conference on Urban Drainage Modelling},pages={477-484},abstract={The effect on removal efficiency and hydraulic performance of retrofitting an existing pond was modelled using the commercial software Mike21 and compartmental modelling. The Mike21 model had previously been calibrated on the studied pond. Installation of baffles, the addition of culverts under a causeway and removal of an existing island were all studied as possible improvement measures in the pond. The subsequent effect on hydraulic performance and removal of suspended solids was then evaluated. Copper, cadmium, BOD, nitrogen and phosphorous removal were also investigated for the improvement measure showing the best results. Outcomes of this study reveal that all measures increase the removal efficiency of suspended solids. The hydraulic efficiency is improved for all cases, except for the case where the island is removed. Compartmental modelling was also used to evaluate hydraulic performance and facilitated a better understanding of the way each of the different measures affected the flow pattern and performance. It was concluded that the installation of baffles is the best of the studied measures resulting in a reduction in the annual load on the receiving lake by approximately 8,000 kg of suspended solids, 2 kg of copper and 600 kg of BOD.},year={2004},keywords={stormwater pond, numerical model, removal efficiency, retrofitting, compartmental modelling},}

RefWorks RT Conference ProceedingsSR PrintID 1933A1 German, JonasA1 Jansons, KetahA1 Svensson, GilbertA1 Karlsson, DickA1 Gustafsson, Lars-GöranT1 Modelling of different measures for improving removal in a stormwater pondYR 2004T2 Proceedings of the 6th international conference on Urban Drainage ModellingSP 477OP 484AB The effect on removal efficiency and hydraulic performance of retrofitting an existing pond was modelled using the commercial software Mike21 and compartmental modelling. The Mike21 model had previously been calibrated on the studied pond. Installation of baffles, the addition of culverts under a causeway and removal of an existing island were all studied as possible improvement measures in the pond. The subsequent effect on hydraulic performance and removal of suspended solids was then evaluated. Copper, cadmium, BOD, nitrogen and phosphorous removal were also investigated for the improvement measure showing the best results. Outcomes of this study reveal that all measures increase the removal efficiency of suspended solids. The hydraulic efficiency is improved for all cases, except for the case where the island is removed. Compartmental modelling was also used to evaluate hydraulic performance and facilitated a better understanding of the way each of the different measures affected the flow pattern and performance. It was concluded that the installation of baffles is the best of the studied measures resulting in a reduction in the annual load on the receiving lake by approximately 8,000 kg of suspended solids, 2 kg of copper and 600 kg of BOD.LA engOL 30